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Programming Interface Information:
This information is NOT intended to be used as Programming Interfaces of z/VM. |
DMSCDB
Control Block Contents
DMSCDB DSECT
Cross Reference (Contains links to field and bit definitions)
DMSCDB Prolog
NAME : DMSCDB
DESCRIPTION: COMDIR CONTROL BLOCK
DSECT : DMSCDB
FUNCTION : The DMSCDB macro provides a mapping
of the COMDIR control block. The macro contains
two DSECTs: DMSCDB and CDBOVL.
DMSCDB Control Block Content
DMSCDB DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure DMSCDB COMDIR CONTROL BLOCK 0000 0 Character 8 CDBEYEC eyecatcher for COMDIR block 0008 8 Character 24 CDBSYS system level information 0008 8 Character 18 CDBSFID system filespec 0008 8 Character 8 CDBSFN system file name 0010 16 Character 8 CDBSFT system file type 0018 24 Character 2 CDBSFM system file mode 001A 26 Character 1 CDBSFLG system flags 001B 27 Character 1 * 001C 28 Address 4 CDBSBLK ptr to NAMEFSYS SCBLOCK 0020 32 Character 24 CDBUSER user level information 0020 32 Character 18 CDBUFID user filespec 0020 32 Character 8 CDBUFN user file name 0028 40 Character 8 CDBUFT user file type 0030 48 Character 2 CDBUFM user file mode 0032 50 Character 1 CDBUFLG user flags 0033 51 Character 1 * 0034 52 Address 4 CDBUBLK ptr to NAMEFUSE SCBLOCK 0038 56 Character 20 CDBCR 0038 56 Signed 4 CDBCDSCE COMDIR saved C/E ptr 003C 60 Signed 4 CDBUSCE USER saved C/E ptr 0040 64 Signed 4 CDBUSCEL USER saved C/E length 0044 68 Character 8 CDBUSRI USER saved RESID
DMSCDB Storage Layout
*** DMSCDB - COMDIR CONTROL BLOCK
*
* +-------------------------------------------------------+
* 0 | CDBEYEC |
* +-------------------------------------------------------+
* 8 | |
* = CDBSYS =
* | |
* +-------------------------------------------------------+
* 20
*
*** DMSCDB - COMDIR CONTROL BLOCK
*** Overlay for CDBSYS in DMSCDB
*
* +-------------------------------------------------------+
* 8 | |
* = CDBSFID =
* | +-----------------------------------------+
* | | 1A
* +-------------+
*
*** Overlay for CDBSYS in DMSCDB
*** Overlay for CDBSFID in DMSCDB
*
* +-------------------------------------------------------+
* 8 | CDBSFN |
* +-------------------------------------------------------+
* 10 | CDBSFT |
* +-------------+------+------+---------------------------+
* 18 | CDBSFM |:SFLG |//////| CDBSBLK |
* +-------------+------+------+---------------------------+
* 20 | |
* = CDBUSER =
* | |
* +-------------------------------------------------------+
* 38
*
*** Overlay for CDBSFID in DMSCDB
*** Overlay for CDBUSER in DMSCDB
*
* +-------------------------------------------------------+
* 20 | |
* = CDBUFID =
* | +-----------------------------------------+
* | | 32
* +-------------+
*
*** Overlay for CDBUSER in DMSCDB
*** Overlay for CDBUFID in DMSCDB
*
* +-------------------------------------------------------+
* 20 | CDBUFN |
* +-------------------------------------------------------+
* 28 | CDBUFT |
* +-------------+------+------+---------------------------+
* 30 | CDBUFM |:UFLG |//////| CDBUBLK |
* +-------------+------+------+---------------------------+
* 38 | |
* = CDBCR =
* | +---------------------------+
* | | 4C
* +---------------------------+
*
*** Overlay for CDBUFID in DMSCDB
*** Overlay for CDBCR in DMSCDB
*
* +---------------------------+---------------------------+
* 38 | CDBCDSCE | CDBUSCE |
* +---------------------------+---------------------------+
* 40 | CDBUSCEL | CDBUSRI- |
* +---------------------------+---------------------------+
* 48 | -(044) | 4C
* +---------------------------+
*
*** Overlay for CDBCR in DMSCDB
DMSCDB Cross Reference
Symbol Dspl Value -------------- ---- ----- CDBCDSCE 0038 CDBCR 0038 CDBEYEC 0000 CDBSBLK 001C CDBSFID 0008 CDBSFLG 001A CDBSFM 0018 CDBSFN 0008 CDBSFT 0010 CDBSYS 0008 CDBUBLK 0034 CDBUFID 0020 CDBUFLG 0032 CDBUFM 0030 CDBUFN 0020 CDBUFT 0028 CDBUSCE 003C CDBUSCEL 0040 CDBUSER 0020 CDBUSRI 0044
Last updated on 1 May 2002 at 14:16:17 EDT.
Copyright IBM Corporation, 1990, 2002